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To throw another turbo into the mix, we are currently testing our twin scroll turbo kit's using Lancer Evolution turbos, specially prepped by FP for us, and one of the turbo's we plan to test in the near future is this twin scroll 68hta turbo....

This turbo will be avaialable with 9, 9.8 or 10.5 cm housings and currently we tested our 2.5 liter header/uppipe setup on my stock longblock 2.0 liter with the largest of our header primary diameters, Evo 9 turbo with a 9 cm housing, IWG, a mild tune and pump gas, it made the graph shown in post #19. The car feels great and there's alot more left in it even on pump gas.

getting the exhaust through the turbine isnt really the problem on this turbo......its flowing "47 lb" through the compressor housing thats the issue.

Hey, I recanted in a post back there somewhere -- my conclusion is now that it's ok up to a VF39 -- but you yourself helped to convince me I've maxed out the exhaust at this time. I never said there wasn't a point that 2.5" wouldn't do.

Dom seems to think the major restriction was the exhaust side. Like I have said, I can't wait to eliminate this variable.

Well, I have to admit I'm curious. Does anybody actually have a dyno plot for the 18G-XT? Sure haven't seen one in this thread, just a lot of hta68 trash talk.

See the lists HERE for links to logs and plots. The highest whp a HTA68 made was 330whp on a 2.5L, while even an older TD05-18G made almost 360whp on a smaller 2.0L.

There is nothing wrong with a HTA68 for those who want quick spool and moderate power, but when ppl try and pass it off as a turbo that is bigger or better then what it is, you'll find ppl will always object.

You post a link to a thread where a guy claims he made 399. No dyno sheet, no logs, nothing. My car makes 600whp with a TD04

Quote:

Originally Posted by Dave D.

It took E85 to do it. The other barn-burners needed E85, meth, or race gas to get to this level.

And the HTA68 was on E70. Check the list, there are 18g's making more power on less boost with less timing (plus I'm pretty sure Renosuby's result was on 93 pump fuel)

I'm not having a go at your choice for using a HTA68, just the incorrect information that ppl constantly spread about the HTA68.

TBH the HTA68 is a great turbo for what it is - a 16g that provides fast boost response with a little more whp then stock sti turbo - but at the end of the day, it is only a 16g with a ~10% higher flowing comp wheel.

PPL should stop quoting and spreading the BS power figures, as it is distracting and wrong and leads to other NASIOC members buying a turbo that does not meet their needs.

Quote:

Originally Posted by rubinm

Myself I'm interested in pump gas results. Guess I'll have to see what I can find for reference besides my own data points.

Time and time agin ppl have shown the HTA68 doesn't make the numbers on pump fuel. Most get around 300whp on pump - and that is on a dyno, and every man + dog knows dyno are for tuning, not for accurately comparing whp/tq figures.

Quote:

Originally Posted by rubinm

My hypothesis at this point is that small hotsides do very well with high octane, allowing quick spool and avoiding pulled timing on top.

Of course I'm not running a 7cm^2 hotside, which is why I think the 10cm^2 hotside with a free-flowing exhaust might make a statement on pump.

As I mentioned above, at the end of the day, it is only a 16g with a ~10% higher flowing comp wheel - so regardless of turbine flow, you're still limited by the low flowing compressor wheel.

They had a good run with this little turbo. FP, Slap some more parts togther.. Nasioc needs a new "turbo of the week"

I have seen this time and time again With turbo shops in the last 8 years I have been here. THey come out with some new super turbo. Kick back to some dyno shop to make amazing plots. They sell a thousand of them and people realize, it actualy sucks.

Skip the 18G altogher. I never liked the 18G on these motors. 16G or 20G is what I recomend.

C

Quote:

Originally Posted by wrxsti.l

You post a link to a thread where a guy claims he made 399. No dyno sheet, no logs, nothing. My car makes 600whp with a TD04

And the HTA68 was on E70. Check the list, there are 18g's making more power on less boost with less timing (plus I'm pretty sure Renosuby's result was on 93 pump fuel)

I'm not having a go at your choice for using a HTA68, just the incorrect information that ppl constantly spread about the HTA68.

TBH the HTA68 is a great turbo for what it is - a 16g that provides fast boost response with a little more whp then stock sti turbo - but at the end of the day, it is only a 16g with a ~10% higher flowing comp wheel.

PPL should stop quoting and spreading the BS power figures, as it is distracting and wrong and leads to other NASIOC members buying a turbo that does not meet their needs.

Time and time agin ppl have shown the HTA68 doesn't make the numbers on pump fuel. Most get around 300whp on pump - and that is on a dyno, and every man + dog knows dyno are for tuning, not for accurately comparing whp/tq figures.

As I mentioned above, at the end of the day, it is only a 16g with a ~10% higher flowing comp wheel - so regardless of turbine flow, you're still limited by the low flowing compressor wheel.

Second post down the page. 411 at the wheel. Again, I contribute this completely to a high reading dyno, but hey, there's a dyno of it.

As for pump gas, I can't seem to find the thread I'm looking for. Some guy that was running a 68hta on a built (I think) 2.1L, had issues, Dom put on a 10cm hotside, retuned, gained 30whp on pump. Although, it still looked like it was losing power by the 8k redline. Ring any bells? Someone point me in the right direction?

basically you can get any 18g configuration power curve by using a 20g

benefit of the 3" inlet?

So lets say your looking to lose minimal spool buy stepping up up to a 20g from a vf turbo. You decide you want the smaller compressor td05 and the smaller exhaust housing 7cm, but then why would you get a 3" inlet? Just wondering why the option is there and if and where its wise to go 3" over 2.4".

just did some minor research and it looks like the 3" inlet tapers to a 2.4" right at the inducer. The wheel inducer is the same size whether you go 2.4" or 3". With the 3", it looks like you "have" to delete the tgvs and fitment becomes a hassle.

so on a 2.0l it looks like the td05 20g 8cm^2 would be the best for daily driving, you get decent spool up and the top end.